Institutional shares held 30.1 Million
671K calls
858K puts
Total value of holdings $2.77B
$61.7M calls
$78.9M puts
Market Cap $2.93B
31,831,400 Shares Out.
Institutional ownership 94.55%
# of Institutions 343


Latest Institutional Activity in TMDX

Top Purchases

Q1 2025
Emerald Advisers, LLC Shares Held: 455K ($41.8M)
Q1 2025
New York State Common Retirement Fund Shares Held: 142K ($13.1M)
Q1 2025
Emerald Mutual Fund Advisers Trust Shares Held: 263K ($24.2M)
Q1 2025
Lisanti Capital Growth, LLC Shares Held: 28.9K ($2.66M)
Q1 2025
Global Assets Advisory, LLC Shares Held: 14.9K ($1.37M)

Top Sells

Q1 2025
Gamma Investing LLC Shares Held: 1.56K ($144K)
Q1 2025
Handelsbanken Fonder Ab Shares Held: 9.9K ($911K)
Q1 2025
Envestnet Asset Management Inc Shares Held: 23.4K ($2.15M)
Q1 2025
Catalyst Capital Advisors LLC Shares Held: 3.15K ($290K)
Q1 2025
Rakuten Securities, Inc. Shares Held: 450 ($41.4K)

About TMDX

TransMedics Group, Inc., a commercial-stage medical technology company, engages in transforming organ transplant therapy for end-stage organ failure patients in the United States and internationally. The company offers Organ Care System (OCS), a portable organ perfusion, optimization, and monitoring system that utilizes its proprietary and customized technology to replicate near-physiologic conditions for donor organs outside of the human body. Its Organ Care System includes OCS LUNG for the preservation of standard criteria donor lungs for double-lung transplantation; OCS Heart, a technology for extracorporeal perfusion and preservation of donor hearts; and OCS Liver for the preservation of donor livers. The company was founded in 1998 and is headquartered in Andover, Massachusetts.


Insider Transactions at TMDX

Insider Transaction List

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Date Insider Transaction Ownership Type Shares Traded Value / Price
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Last 12 Months Summary

Buy / Acquisition
350K Shares
From 19 Insiders
Grant, award, or other acquisition 117K shares
Exercise of conversion of derivative security 215K shares
Bona fide gift 18K shares
Sell / Disposition
285K Shares
From 9 Insiders
Open market or private sale 267K shares
Bona fide gift 18K shares

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P - Open market or private purchase×
S - Open market or private sale×
V - Transaction voluntarily reported earlier than required×
A - Grant, award, or other acquisition×
D - Sale (or disposition) back to the issuer×
F - Payment of exercise price or tax liability×
I - Discretionary transaction×
M - Exercise of conversion of derivative security×
C - Conversion of derivative security×
E - Expiration of short derivative position×
H - Expiration (or cancellation) of long derivative position with value received×
O - Exercise of out-of-the-money derivative securities×
X - Exercise of in-the-money or at-the-money derivatives securities×
G - Bona fide gift×
L - Small Acquisition×
W - Acquisition or disposition by will or laws×
Z - Deposit into or withdrawal from voting trust×
J - Other acquisition or disposition×
K - Transaction in equity swap or similar instrument×
U - Disposition due to a tender of shares in a change of control transaction×
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